Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c00d6901544f91…

MALICIOUS

PDF

41.0 KB Created: 2020-08-27 19:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c1f67b519dbd6b8dec7f4c0b063f45fd SHA-1: 7502083267fbf1d2c776266d493bb6cf5d4ef1b6 SHA-256: 27c00d6901544f91461abe094aa87331ebfa7e841d4e952a52ae4b36e340b61c
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=what+is+adjectival+clause+and+phrase'. This indicates the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=what+is+adjectival+clause+and+phrase
    • http://files.threaditames.com/uploads/1/3/1/4/131452982/lijodesezun.pdf
    • http://jobuku.canaanchristianministries.co.uk/uploads/1/3/1/3/131379578/efa5d66cb4ca14b.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/komobumuwekepa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/paxukobikalovefufokutep.pdf
    • https://cdn.shopify.com/s/files/1/0451/8638/4023/files/astm_d638_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/gefozugenatuzugefap.pdf
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/80383036155.pdf
    • https://cdn.shopify.com/s/files/1/0433/2630/8510/files/90099374799.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7194/files/causes_of_the_civil_war_webquest_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0462/5504/6807/files/global_news_reporters_vancouver.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/48739105155.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006238.bin
8c307b25baf9fa7b7d874e7fbe3a2ffa82857df69bade80c7f309099eebee641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6238 5312 bytes
font_01_sfnt_off0000744c.bin
4295876f72552ada3f798052ce0153291650824388e02aba5ecbf354901d99e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744C 10304 bytes

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